/* 修复 form-control width: 100% 导致的兼容问题 */
form>div.input-group select.form-control {
    width: auto;
}

form div.interval {
    padding-top: 20px;
}

.form-check>label {
    padding-right: 8px;
}

h3 {
    text-align: center;
}